re #3588 security fix, formats fix, added timetable export element

git-svn-id: svn://develop.studip.de/studip/trunk@27619 c5b85792-5220-0410-ad23-ed5b6b8ad999
re #3588 security fix, formats fix, added timetable export element

git-svn-id: svn://develop.studip.de/studip/trunk@27620 c5b85792-5220-0410-ad23-ed5b6b8ad999